Chest pack



FIG. 1 is a top front right perspective view of a chest pack showing the new design;

FIG. 2 is a bottom rear left perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dashed lines on the pack are for environmental purposes only and form no part of the claimed design.

The broken cut lines on the straps are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a chest pack, as shown and described. 